摘要
采用真空浸入法将聚乙二醇(PEG)吸附于多孔陶粒后,采用环氧进行包封,制得PEG/陶粒定形相变颗粒。使用DSC/TG、FTIR、高温烘烤及水浴试验等手段对PEG/陶粒相变颗粒的储热性能、相容性、定形效果及降温效果进行表征,结果表明:PEG/陶粒相变颗粒的相变焓约72.8 J/g,相变开始点约50.4℃;PEG与多孔陶粒之间为物理吸附作用,具有较好的相容性,能够保证复合物中的PEG发挥相变特性;190℃下PEG/陶粒相变颗粒不泄漏,具有良好的定形效果;水浴测温表明,6.2%PEG掺量的相变陶粒试件降温在6.8℃左右,持续约4.5 h。
The novel shape-stabilized PEG/ceramsite phase change materials were prepared by vacuum impregnation method, afterwards were encapsulated by a thin layer of cured epoxy resin. In this composite,polyethylene glycol acts as the latent heat storage material and porous ceramisite serves as the supporting material,which provides structural strength and prevents the leak- age of melted PEG. The thermal properties,compatibility,shaping effects and coding effects were characterized by DSCfI＇G, FT1R, the baking test and water bath test, respectively. Results showed that phase change enthalpy and onset temperature of composites were about 72.8J/g and 50.4 ℃,respectively. The physical adsorption and good compatibility were found between PEG and cerum- site,ensuring PEG in composites retained a good phase change performance. The composite had a stable form and there was no leakage of melted PEG under 190℃. The water bath test showed that the phase change ceramsite samples containing 6.2% PEG were about 6.8 ℃ cooler than usual ones and the effect could last about 4.5 h.
出处
《新型建筑材料》
2013年第6期72-75,共4页
New Building Materials
基金
国家自然科学基金资助项目(51178491)
重庆市科技重点攻关计划项目(CSTC2011AB6067)
交通运输部科技项目(2012-319-814-200)
广西交通运输厅科技计划项目(桂交科2013-11)
重庆交通大学研究生教育创新基金项目(20120105)
关键词
PEG
陶粒相变颗粒
真空浸入
储热性能
降温效果
PEG/ceranasite composites, vacuum impregnation： thermal properties
cooling effect
